Depending on the ability of shield control this could be a serious contender. If they put a shield around their opponent’s face/head and made it impervious to air flow, it would be enough to suffocate the opponent. It seems cheap, but it’s being resourceful. If they combined shielding and counters around a fire user, they’d incinerate themselves. Sometimes a perfect defense is a deadly offensive ability. Probably wouldn’t choose this one despite that.

10th Bloodline: (mine) ChaosBeing: a mixture of all bloodlines and abilities, but completely random and out of the caster’s conscious control: note, magics used against these persons tend to swerve around them, or affect others near them instead (in the case of curses). the usually empathic chaosBeings will most often attempt to clear these curses from affecting others, or won’t have any clue whatsoever they were even attacked. (hoping I at least got you to giggle, there, Foxxy)